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Distance measurement system and method based on machine vision

A machine vision and ranging system technology, applied in the measurement distance, line-of-sight measurement, instruments and other directions, can solve the problems of inability to accurately measure the distance of obstacles, the range of distance measurement is difficult to exceed 100 meters, and the radar cannot recognize it. Simple structure, small size and high safety

Pending Publication Date: 2021-04-30
广州安特激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, radar cannot identify items such as traffic lights, signs, etc.
In addition, whether it is millimeter-wave or lidar, the range of low-power vehicle-mounted radars is difficult to exceed 100 meters.
However, the machine vision system cannot accurately measure the distance of obstacles

Method used

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  • Distance measurement system and method based on machine vision
  • Distance measurement system and method based on machine vision
  • Distance measurement system and method based on machine vision

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Embodiment

[0029] The specific embodiment of the present invention is as figure 1 As shown, a ranging system based on machine vision includes a controller 7 and at least one set of ranging modules. The ranging module includes a base 1 on which a galvanometer 5 , a liquid lens 4 , a fixed-focus lens 3 and a camera 2 are sequentially arranged along the optical path. The vibrating mirror 5 , the liquid lens 4 and the camera 2 are all electrically connected to the controller 7 .

[0030] The vibration mirror 5 includes a connected vibration head and a driving mechanism. The driving mechanism can be a motor, which is installed on the base 1 . The motor drives the oscillating head to swing to realize the scanning action. The driving mechanism of the vibrating mirror 5 is connected with the controller.

[0031] There are at least two groups of ranging modules arranged side by side, and the working distances of the fixed-focus lenses in each group of ranging modules are different from each o...

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Abstract

The invention discloses a distance measurement system and method based on machine vision, and the system comprises a controller and at least one group of distance measurement modules, and each distance measurement module comprises a galvanometer, a liquid lens, a prime lens and a camera, which are sequentially arranged along an optical path, wherein the galvanometer, the liquid lens and the camera are electrically connected with the controller. The method comprises the following steps: when a distance measurement system based on machine vision is used for testing a vehicle distance, the diopter of a liquid lens in a distance measurement module is adjusted, so that a galvanometer continuously scans an object within a distance L1 until a camera is successfully focused; and the controller calculates the actual distance L2 between the distance measuring module and the object according to the electric signal corresponding to the diopter change of the liquid lens at the moment. The distance measurement system and method based on machine vision provided by the invention are simple in structure and high in distance measurement precision.

Description

technical field [0001] The invention relates to the field of vehicle distance measurement, in particular to a distance measurement system and method based on machine vision. Background technique [0002] With the continuous expansion of urban scale, people's dependence on cars is gradually increasing when traveling. In order to achieve the goal of automatic driving, the research and development of the vehicle ranging system is very important. The accuracy and production cost of the vehicle ranging system will affect the development direction of the future vehicle automatic driving. [0003] The current automatic driving system uses the visual system to capture objects, cooperate with distance measurement such as lidar, and then model. The visual system itself cannot recognize the distance of objects. This kind of system has the problem of complex structure, time-consuming modeling, large equipment installation space, and high maintenance difficulty. In addition, the abili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01C3/00G01C3/02
CPCG01B11/02G01C3/00G01C3/02
Inventor 李陵江田辉肖群王敏裴浩
Owner 广州安特激光技术有限公司
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